There are definitely regional differences in price, which will affect the break even point. My own neck of nowhere is full of people on large properties living below the poverty line. A dozen free range eggs nets $2. Whole chicken breast is $1/lb at the store (granted, it looks like two apes butchered it bare fisted, but...) while whole birds can be obtained on special at $.49 per pound. Free Range and "organic" (not that anyone could possibly afford official certification) carry no premium, people just want to put food on the table.
I've done everything I reasonably can to get my prices down, and now buy bulk feed from the same mill producing food for the local businesses (Tyson Foods, Wayne Farms, LLC, Kock, Pilgrim's Pride...) Its so tough I can drive by at least a dozen failed commercial operations within 30 miles of me - huge quonset huts with their fans for raising thousands of chickens at once, now falling to rot.
I pay a premium out of my entertainment budget to maintain my birds, and as insurance against future shortages. Nothing more than that.
Based on the situation you've described, there's no way you are breaking even, and those breeds are more valuable to most as pets than as layers. I'd look to rehome them, and recoup what losses you can with a low price sale.